package thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * 线程池
 */
public class ThreadPoolDemo {
    public static void main(String[] args) {
        //1.创建线程池
        ExecutorService threadPool = Executors.newFixedThreadPool(2);

        //2.将任务交给线程池
        for(int i=0;i<5;i++){
            Runnable r = new Runnable() {
                @Override
                public void run() {
                    try {
                        Thread t = Thread.currentThread();
                        System.out.println(t.getName()+":正在执行任务......");
                        Thread.sleep(5000);
                        System.out.println(t.getName()+":执行完毕");
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            };
            threadPool.execute(r);
            System.out.println("将一个任务交给了线程池");
        }
        threadPool.shutdown();//线程池关闭，不再接收新任务，之前交给线程池的任务执行完毕后结束
        //threadPool.shutdownNow();//线程池关闭，不再接收新任务，且正在执行的任务全部打断
        System.out.println("线程池关闭了");
    }
}
